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Image processing for enhanced observer agreement in the evaluation of periapical bone changes.
Int Endod J. 2002 Jul; 35(7):615-22.IE

Abstract

AIM

The aim of the present study was to evaluate the effect of root canal treatment on periapical lesions by conventional and subtracted digital radiographic images of clinical cases.

METHODOLOGY

Eleven patients who exhibited clinical or radiological signs of periapical pathology received root canal treatment. Periapical radiographs were obtained immediately postoperatively and recall radiographs at intervals of 3, 6, 9 and 12 months postoperatively were obtained. Identical exposure geometry was maintained. From the standardized radiographs digitized images were produced. Four experienced practitioners interpreted the radiographs and the digitized images. They assessed 59 pairs of images projected at random using a slide projector. On the left side, there was a reference image with no lesion, and on the right an image either with or without a lesion. Each reader was asked to rate each pair of images on a three-point scale: yes, absolutely sure that gain or loss was present; uncertain, if there was gain or loss; no, absolutely sure that no gain or loss was present. There was no time limit for each decision. Inter- and intra-examiner agreement was analyzed using the kappa-statistic for the diagnosis of periapical bone density changes in the periapical region at the different time points either in conventional pairs of radiographs or using digital subtraction images.

RESULTS

The inter-examiner agreement (P < 0.001) and the intra-examiner agreement (P = 0.02) when digital pictures where evaluated were significantly higher than with conventional radiographs.

CONCLUSIONS

A highly significantly better observer agreement was achieved by digital subtraction radiography during the evaluation of the outcome of root canal treatment on periapical lesions.

Authors+Show Affiliations

Nicopoulou-Karayianni K
Department of Oral and Radiographic Diagnosis, School of Dental Medicine, University of Athens, Greece. ketykara@otenet.gr
Bragger U
No affiliation info available
Patrikiou A
No affiliation info available
Stassinakis A
No affiliation info available
Lang NP
No affiliation info available

MeSH

AdultAgedAlveolar Bone LossColorContrast MediaDental Pulp DiseasesHumansMiddle AgedObserver VariationOutcome Assessment, Health CareRadiography, Dental, DigitalRoot Canal TherapySubtraction Technique

Pub Type(s)

Clinical Trial
Journal Article

Language

eng

PubMed ID

12190901

Citation

Nicopoulou-Karayianni, K, et al. "Image Processing for Enhanced Observer Agreement in the Evaluation of Periapical Bone Changes." International Endodontic Journal, vol. 35, no. 7, 2002, pp. 615-22.
Nicopoulou-Karayianni K, Bragger U, Patrikiou A, et al. Image processing for enhanced observer agreement in the evaluation of periapical bone changes. Int Endod J. 2002;35(7):615-22.
Nicopoulou-Karayianni, K., Bragger, U., Patrikiou, A., Stassinakis, A., & Lang, N. P. (2002). Image processing for enhanced observer agreement in the evaluation of periapical bone changes. International Endodontic Journal, 35(7), 615-22.
Nicopoulou-Karayianni K, et al. Image Processing for Enhanced Observer Agreement in the Evaluation of Periapical Bone Changes. Int Endod J. 2002;35(7):615-22. PubMed PMID: 12190901.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Image processing for enhanced observer agreement in the evaluation of periapical bone changes. AU - Nicopoulou-Karayianni,K, AU - Bragger,U, AU - Patrikiou,A, AU - Stassinakis,A, AU - Lang,N P, PY - 2002/8/23/pubmed PY - 2002/12/12/medline PY - 2002/8/23/entrez SP - 615 EP - 22 JF - International endodontic journal JO - Int Endod J VL - 35 IS - 7 N2 - AIM: The aim of the present study was to evaluate the effect of root canal treatment on periapical lesions by conventional and subtracted digital radiographic images of clinical cases. METHODOLOGY: Eleven patients who exhibited clinical or radiological signs of periapical pathology received root canal treatment. Periapical radiographs were obtained immediately postoperatively and recall radiographs at intervals of 3, 6, 9 and 12 months postoperatively were obtained. Identical exposure geometry was maintained. From the standardized radiographs digitized images were produced. Four experienced practitioners interpreted the radiographs and the digitized images. They assessed 59 pairs of images projected at random using a slide projector. On the left side, there was a reference image with no lesion, and on the right an image either with or without a lesion. Each reader was asked to rate each pair of images on a three-point scale: yes, absolutely sure that gain or loss was present; uncertain, if there was gain or loss; no, absolutely sure that no gain or loss was present. There was no time limit for each decision. Inter- and intra-examiner agreement was analyzed using the kappa-statistic for the diagnosis of periapical bone density changes in the periapical region at the different time points either in conventional pairs of radiographs or using digital subtraction images. RESULTS: The inter-examiner agreement (P < 0.001) and the intra-examiner agreement (P = 0.02) when digital pictures where evaluated were significantly higher than with conventional radiographs. CONCLUSIONS: A highly significantly better observer agreement was achieved by digital subtraction radiography during the evaluation of the outcome of root canal treatment on periapical lesions. SN - 0143-2885 UR - https://www.unboundmedicine.com/medline/citation/12190901/Image_processing_for_enhanced_observer_agreement_in_the_evaluation_of_periapical_bone_changes_ DB - PRIME DP - Unbound Medicine ER -